Napa September 30 Weather Records

Daily averages and all-time records for weather in Napa, California for the date of September 30.
September 30 All-Time Records
1901–2024
Highest temperature 100 °F 1980
Lowest temperature 37 °F 2009
Lowest daily high 58 °F 1930
Highest daily low 69 °F 1984
Most precipitation 0.86 inches 1983
September 30 Average Weather
1991–2020 1
Average high 79.5 °F
Average low 48.5 °F
Chance precipitation 5.5%
Napa September 30 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 72 57 0.07 n/a
2022 90 52 0.00 n/a
2021 88 44 0.00 n/a
2020 91 51 0.00 n/a
2019 70 41 0.00 n/a
2018 77 55 0.00 n/a
2017 78 50 0.00 0.0
2016 73 52 0.00 n/a
2015 68 53 0.00 n/a
2014 78 45 0.00 n/a
2013 72 54 0.02 n/a
2012 93 46 0.00 n/a
2011 74 57 0.00 n/a
2010 78 50 0.00 n/a
2009 76 37 0.00 n/a
2008 80 46 0.00 n/a
2007 79 38 0.00 n/a
2006 69 50 0.00 n/a
2005 92 45 0.00 n/a
2004 67 46 0.00 n/a
2003 78 43 0.00 n/a
2002 73 47 0.00 n/a
2001 98 45 0.00 n/a
2000 90 51 0.00 n/a
1999 91 52 0.00 n/a
1998 68 55 0.00 0.0
1997 86 53 0.00 0.0
1996 66 51 0.00 0.0
1995 83 50 0.00 0.0
1994 79 50 0.00 0.0
1993 82 53 0.00 0.0
1992 79 58 0.00 0.0
1991 92 51 0.00 0.0
1990 92 55 0.00 0.0
1989 79 50 0.00 0.0
1988 95 52 0.00 0.0
1987 89 56 0.00 0.0
1986 80 55 0.00 0.0
1985 69 46 0.00 0.0
1984 83 69 0.00 0.0
1983 68 57 0.86 0.0
1982 79 51 0.00 0.0
1981 91 47 0.00 0.0
1980 100 53 0.00 0.0
1979 90 52 0.00 0.0
1978 96 57 0.00 0.0
1977 79 47 0.00 0.0
1976 81 61 0.00 0.0
1975 79 46 0.00 0.0
1974 89 46 0.00 0.0
1973 78 50 0.00 0.0
1972 86 54 0.00 0.0
1971 69 42 0.17 0.0
1970 91 50 0.00 0.0
1969 83 50 0.00 0.0
1968 74 48 0.00 0.0
1967 80 55 0.00 0.0
1966 79 54 0.00 0.0
1965 89 50 0.00 0.0
1964 80 46 0.00 0.0
1963 79 56 0.00 0.0
1962 88 48 0.00 0.0
1961 88 43 0.00 0.0
1960 70 50 0.00 0.0
1959 79 45 0.00 0.0
1958 90 52 0.00 0.0
1957 n/a 50 0.00 0.0
1956 88 51 0.00 0.0
1955 81 43 0.00 0.0
1954 68 45 0.00 0.0
1953 80 42 0.00 0.0
1952 97 49 0.00 0.0
1951 75 50 0.00 0.0
1950 75 40 0.00 0.0
1949 87 46 0.00 0.0
1948 85 45 0.00 0.0
1947 74 47 0.00 n/a
1946 78 48 0.00 n/a
1945 89 47 0.00 n/a
1944 81 47 0.00 n/a
1943 94 50 0.00 n/a
1942 80 47 0.00 n/a
1941 90 46 0.00 n/a
1940 88 47 0.00 n/a
1939 78 45 0.00 n/a
1938 84 48 0.00 n/a
1937 72 44 0.00 n/a
1936 73 46 0.00 n/a
1935 84 49 0.00 n/a
1934 93 50 0.00 n/a
1933 n/a n/a 0.00 n/a
1932 72 41 0.00 n/a
1931 92 44 0.00 n/a
1930 58 47 0.09 n/a
1929 73 45 0.00 n/a
1928 75 45 0.00 n/a
1927 81 59 0.00 n/a
1926 66 42 0.00 n/a
1925 78 40 0.00 n/a
1924 73 41 0.00 n/a
1923 91 n/a 0.00 n/a
1922 86 52 0.00 n/a
1921 80 48 0.00 n/a
1920 72 52 0.00 n/a
1919 68 44 0.00 n/a
1918 77 51 0.00 n/a
1917 71 51 0.00 n/a
1916 n/a n/a n/a n/a
1915 n/a n/a n/a n/a
1914 69 53 0.00 n/a
1913 90 67 0.00 n/a
1912 80 54 0.00 n/a
1911 64 49 0.00 n/a
1910 88 46 0.00 n/a
1909 71 46 n/a n/a
1908 86 51 0.00 n/a
1907 74 50 0.00 n/a
1906 89 50 0.00 n/a
1905 80 49 0.00 n/a
1904 85 n/a 0.00 n/a
1903 64 45 0.00 n/a
1902 91 47 0.00 n/a
1901 73 55 0.00 n/a
What's the all-time high for Napa on 9/30?
For the date of Sep 30, the highest temperature ever reached in Napa history is 100 °F which happened in 1980.
Highest Temperatures in Napa on September 30
Rank Temperature Year
1 100 °F 1980
2 98 °F 2001
3 97 °F 1952
4 96 °F 1978
5 95 °F 1988
6 94 °F 1943
7 93 °F 2012
7 93 °F 1934
9 92 °F 1991
9 92 °F 1990
9 92 °F 2005
9 92 °F 1931
What's the all-time low for Napa on 9/30?
For the date of Sep 30, the lowest temperature ever reached in Napa history is 37 °F which happened in 2009.
Lowest Temperatures in Napa on September 30
Rank Temperature Year
1 37 °F 2009
2 38 °F 2007
3 40 °F 1925
3 40 °F 1950
5 41 °F 1932
5 41 °F 1924
5 41 °F 2019
8 42 °F 1953
8 42 °F 1926
8 42 °F 1971
Lowest High Temperatures in Napa on September 30
Rank Temperature Year
1 58 °F 1930
2 64 °F 1903
2 64 °F 1911
4 66 °F 1996
4 66 °F 1926
6 67 °F 2004
7 68 °F 1983
7 68 °F 1954
7 68 °F 1919
7 68 °F 1998
7 68 °F 2015
What's the most it has ever rained in Napa on 9/30?
For the date of Sep 30, the most precipitation ever recorded in Napa history is 0.86 inches which happened in 1983.
All-Time Most Precipitation in Napa on September 30
Rank Precipitation Year
1 0.86 inches 1983
2 0.17 inches 1971
3 0.09 inches 1930
4 0.07 inches 2023
5 0.02 inches 2013
Weather Station Details
Years Station Coordinates
1999–2024 Napa County Airport location
1901–1998 Napa State Hospital location
Notes
1: Daily averages are a moving average which includes 14 days before and after the date.
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